Ticket #36379: 36379.diff

src/wp-admin/includes/class-walker-category-checklist.php

@@ -98 +98 @@
                                 ' tabindex="0" role="checkbox" aria-checked="' . $aria_cheched . '">' .
                                 esc_html( apply_filters( 'the_category', $category->name ) ) . '</div>';
                 } else {
+                        $checked = checked( in_array( $category->term_id, $args['selected_cats'] ), true, false );
+
                         /** This filter is documented in wp-includes/category-template.php */
                         $output .= "\n<li id='{$taxonomy}-{$category->term_id}'$class>" .
                                 '<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="'.$name.'[]" id="in-'.$taxonomy.'-' . $category->term_id . '"' .
-                                checked( in_array( $category->term_id, $args['selected_cats'] ), true, false ) .
+                                $checked .
                                 disabled( empty( $args['disabled'] ), false, false ) . ' /> ' .
                                 esc_html( apply_filters( 'the_category', $category->name ) ) . '</label>';
+
+                        if ( ! empty( $args['disabled'] ) && $checked ) {
+                                $output .= sprintf(
+                                        '<input value="%d" type="hidden" name="%s[]" />',
+                                        $category->term_id,
+                                        esc_attr( $name )
+                                );
+                        }
                 }
         }